body {
	margin: 0;
	font-family: Verdana, "Helvetica Neue", Helvetica, Arial, sans-serif;
	font-size: 14px;
	line-height: 18px;
	color: #333333;
	background-color: #ffffff;
	height:5000px;
}
th.th_center {
	text-align: center;
}
th.widtd_30 {
	width: 60px;
}
/*top*/
#scrollTop div {
	left: 0;
	overflow: hidden;
	position: absolute;
	top: 0;
	width: 149px;
	margin: 0;
	padding: 0
}
#scrollTop .level-2 {
	background:url(../../images/rocket_up.png) no-repeat scroll -149px 0 transparent;
	display: none;
	height: 250px;
	opacity: 0;
	z-index: 1
}
#scrollTop .level-3 {
	background: none repeat scroll 0 0 transparent;
	cursor: pointer;
	display: block;
	height: 150px;
	z-index: 2
}
#scrollTop {
	background:url(../../images/rocket_up.png) no-repeat scroll 0 0 transparent;
	cursor: default;
	display: block;
	height: 250px;
	overflow: hidden;
	position: fixed;
	right: 0;
	top: 80%;
	width: 149px;
	z-index: 11;
	margin: -125px 0 0;
	padding: 0
}
img.head {
	max-width: 20px; /* 最大宽度为500px*/
	width: 20px; /* 图片的大小为500px*/
 	width:expression(width>20?"20px":width "px");
	max-width: 20px; /* 假如图片的尺寸超过550象素,那么就按550象素显示,高度同比例变化;假如图片的尺寸小于550象素,那么就原尺寸显示。在IE6中有效*/
	height: 20px;
	overflow: hidden; /* 超出的部分隐藏，避免控制图片大小失败而引起的撑开变形*/
}
